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Note 7 - Goodwill (Tables)
 12 Months Ended
Dec. 30, 2017
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Engineering
    
Specialty
Health Care
    
Information
Technology
    
 
Total
  
Balance as of
January 2, 2016
   $
4,411
     $
1,703
     $
5,516
     $
11,630
  
                                 
Goodwill recorded, AHP acquisition
    
-
      
695
      
-
      
695
  
                                 
Balance as of
December 31, 2016
   $
4,411
     $
2,398
     $
5,516
     $
12,325
  
                                 
Goodwill recorded,
RAF acquisition
    
133
      
-
      
-
      
133
  
                                 
Goodwill recorded,
PSR acquisition
    
2,705
      
-
      
-
      
2,705
  
                                 
Goodwill impairment
    
-
      
-
      
(3,478
)
    
(3,478
)
                                 
Balance as of
December 30, 2017
   $
7,249
     $
2,398
     $
2,038
     $
11,685